Nonclustered index helps ORDER BY?

Hi,
Does nonclustered index help ORDER BY clause in the query? If yes, how?
Thanks in advance,
AminSQL Server can use a non-clustered index to provide result ordering by
scanning the index in ORDER BY sequence. However, the optimizer might
choose other methods to provide the ordering (e.g. SORT) due to other
factors, such as using another index to satisfy WHERE or JOIN predicates.
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Hope this helps.
Dan Guzman
SQL Server MVP
"Amin Sobati" <amins@.morva.net> wrote in message
news:%23sWEpkhgEHA.592@.TK2MSFTNGP11.phx.gbl...
> Hi,
> Does nonclustered index help ORDER BY clause in the query? If yes, how?
> Thanks in advance,
> Amin
>|||Amin Sobati wrote:
> Hi,
> Does nonclustered index help ORDER BY clause in the query? If yes,
> how? Thanks in advance,
> Amin
It will also help if your non-clustered index is a covering index.
Remember, all clustered index keys are a part of non-clustered indexes,
which makes designign covering indexes a little easier... in some cases.
--
David G.